sablabra said:0.4mhz, 0.4ghz would be 400mhz(3.6ghz)
Nice overclock, if it passes move on to large FFTs and small FFTs. My experience is that large FFTs will put most strain on your cpu.
small fft's will increase temps more than large fft upto 5c on my c2d, in my experience small fft's is usually more stressful than large.